import router from './router'
import store from './store'
import { Message } from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import { getAccessToken } from '@/utils/auth' // get token from cookie
import getPageTitle from '@/utils/get-page-title'

NProgress.configure({ showSpinner: false }) // NProgress Configuration

const whiteList = ['/login', '/auth-redirect'] // no redirect whitelist

router.beforeEach(async(to, from, next) => {
  // start progress bar
  NProgress.start()

  // set page title
  document.title = getPageTitle(to.meta.title)

  // determine whether the user has logged in
  const hasToken = getAccessToken()
  // debugger

  if (hasToken) {
    if (to.path === '/login') {
      // if is logged in, redirect to the home page
      next({ path: '/' })
      NProgress.done() // hack: https://github.com/PanJiaChen/vue-element-admin/pull/2939
    } else {
      // determine whether the user has obtained his permission roles through getInfo
      // 判断是否已经初始化过
      // 判断的依据是，是否读取到权限
      const initialized = store.getters.permissions && store.getters.permissions.length > 0
      if (initialized) {
        next()
      } else {
        try {
          // 第零步，获取数据字典
          await store.dispatch('dataDict/loadDataDicts')
          // 第一步，获取管理员信息
          await store.dispatch('user/getInfo')
          // 第二步，获取菜单列表，并生成相应的动态路由
          const accessRoutes = await store.dispatch('permission/generateRoutes')
          router.addRoutes(accessRoutes)
          // 第三步，获取权限列表
          await store.dispatch('permission/listAdminPermission')
          // TODO
          // 最终，跳转目标页
          // set the replace: true, so the navigation will not leave a history record
          next({ ...to, replace: true })
        } catch (error) {
          // debugger
          // if (true) {
          //   return;
          // }
          // remove token and go to login page to re-login
          await store.dispatch('user/resetToken')
          Message.error(error || 'Has Error')
          next(`/login?redirect=${to.path}`)
          NProgress.done()
        }
      }
    }
  } else {
    /* has no token*/
    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})
